Not deleting print file (disk capacity?)

What causes this issue?

You have activated the option "Keep print file" in the definition of an
output device.

System Response

This means that the spool work process does not delete the temporary
file used for inclusion of the print data, after the data has been
transferred to an external spool system/printer. These files are
created in the DATA directory of the work process and require disk
capacity.

How to fix this error?

Only activate this option if you explicitly want to follow the output
of this device for test purposes. In other cases it should remain
deactivated.

Error message extract from SAP system. Copyright SAP SE.